I just finished writing and testing my apex and visual force page in Spring '15.  I decided to use the @testSetup method since I have a few different ways that I wanted to test this code.  I used the standard syntax, and all was well in Spring '15 - 85% code coverage, not perfect but I can come back to refine later for those extra few percentage points - Time to DEPLOY to production!  Not so much.  

Validation fails in production (Winter '15) with the error: Unknown annotation: testSetup ... 

I tried switching the API version to a lower version (droped it to 30) and the annotation error persists.

I followed the instructions here to no avail: 
https://www.salesforce.com/us/developer/docs/apexcode/index_Left.htm#CSHID=apex_classes_annotation_testsetup.htm|StartTopic=Content%2Fapex_classes_annotation_testsetup.htm|SkinName=webhelp

My test class is structured properly and has no errors in my sandbox.  Is this just a bug in the Spring '15 beta?

@isTest
public class ClubMembershipControllerTest {

    //
    // First, set up our dataset that all other test methods will use
    // 
    @testSetup static void setup() {
        // my inserts are here

    }
    //
    // This is a negative test to make sure that the student application cannot be duplicated.
    // This test is specifically to test the trigger code.
    //     
    public static testMethod void studentClubApplicationTest() {
        // first test case that uses the above inserts.
    }    
}